M4 機械螺絲 | 鋼鐵 鋅鍍層 (5000 個/包)

Got a full box of 5,000 and the zinc plating is consistently smooth across every single screw—no rough edges or flaking. I used them to secure some steel brackets in an enclosure and they threaded in without any binding. For the price per piece, this is exactly what I needed for production work.

The threads cut clean and seat perfectly into my enclosure holes, no binding or stripped heads across the first hundred I used. For 5000 pieces at this price, the zinc coating is a solid bonus for metal panel work.

The zinc plating is holding up well after a few weeks on outdoor enclosures, no rust spots yet. Threads cut cleanly into pre-tapped holes, and having 5,000 in one box means I won't be reordering for a long time.